From charlesreid1

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<math>
<math>
120 = 5 \times 5 \times 5 - 5
120 = 5 \times 5 \times 5 - 5
</math>
<math>
123 = \phi^{5+5} + \dfrac{1}{\phi^{5+5}}
</math>
</math>



Revision as of 06:06, 17 March 2019

Back to Five Fives

One 5

Various ways of arranging a single 5 to yield different numbers. (More limited than 4, of course...)

$ 5^{\frac{1}{2}} = \sqrt{5} $

$ 5 = 5 $

$ 120 = 5! $


Two 5s

$ 0 = \ln{ \dfrac{5}{5} } $

$ 1 = \dfrac{5}{5} $

$ 2 = \dfrac{ \ln{(5)} }{ \ln{(\sqrt{5})} } $

$ 4 = \dfrac{ \ln{5} }{ \ln{\left( \sqrt{ \sqrt{ 5 } } \right) } } $

$ 5 = \sqrt{5 \times 5} $

$ 10 = 5 + 5 $

$ 11 = \phi^5 - \dfrac{1}{\phi^5} $

$ 24 = \dfrac{5!}{5} $

$ 25 = 5 \times 5 $

$ 55 $

$ 115 = 5! - 5 $

$ 125 = 5! + 5 $

$ 600 = 5 \times 5! $

$ 3125 = 5^5 $

$ 12696403353658275925965100847566516959580321051449436762275840000000000000 = 55! $

Three 5s

$ \dfrac{1}{2} = \dfrac{ \ln{ \left( \dfrac{5}{\sqrt{5}} \right) } }{ \ln{(5)} } $

$ \dfrac{24}{25} = \dfrac{5! + 5}{5!} $

$ 1 = \dfrac{ \sqrt{5 \times 5} }{ 5 } $

$ 2 = \dfrac{ \ln{(5)} }{ \ln{ \left( \dfrac{5}{\sqrt{5}} \right) } } $

$ 3 = \log_{5}{(5! + 5)} $

$ 4 = 5 - \dfrac{5}{5} $

$ 5 = 5 - 5 + 5 $

$ 5 = \sqrt[5]{5^5} $

$ 5 = \sqrt{ \dfrac{ \sqrt{5^5} }{ \sqrt{5} } } $

$ 5 = \dfrac{5 \times 5}{5} $

$ 6 = 5 + \dfrac{5}{5} $

$ 12 = \dfrac{5!}{5+5} $

$ 15 = 5 + 5 + 5 $

$ 20 = 5 \times 5 - 5 $

$ 20 = \dfrac{ 5 \lg{5} }{ \lg{\left(\sqrt{\sqrt{5}}\right)} } $

$ 30 = 5 \times 5 + 5 $

$ 25 = \dfrac{ \sqrt{5^5} }{ \sqrt{5} } $

$ 60 = \dfrac{5!}{ \left( \dfrac{\ln{5}}{\ln{\sqrt{5}}} \right) } $

$ 95 = 5! - 5 \times 5 $

$ 130 = 5! + 5 + 5 $

$ 145 = 5! + 5 \times 5 $

$ 625 = \dfrac{5^5}{5} $

$ 503284375 = 55^5 $

Four 5s

$ 1 = \dfrac{ \ln{ \left( \dfrac{5}{ \sqrt{5} } \right) } + \ln{5} }{ \ln{5} } $

$ 1 = \dfrac{5^5}{5^5} $

$ 1 = \dfrac{ 5 \times 5}{5 \times 5} $

$ 6 = \dfrac{ \ln{(5)} }{ \ln{(\sqrt{5})} } + \dfrac{ \ln{(5)} }{ \ln{(\sqrt{\sqrt{5}})} } $

$ 7 = \sqrt{ \dfrac{5!}{5} + (5 \times 5) } $

$ 8 = \left( \dfrac{ \ln{(5)} }{ \ln{(\sqrt{5})} } \right) \left( \dfrac{ \ln{(5)} }{ \ln{(\sqrt{\sqrt{5}})} } \right) $

$ 9 = 5 + 5 - \dfrac{5}{5} $

$ 11 = 5 + 5 + \dfrac{5}{5} $

$ 12 = \left( \dfrac{5!}{5} \right) \times \left( \dfrac{ \ln{\sqrt{5}} }{ \ln{5} } \right) $

$ 13 = \dfrac{5! - 55}{5} $

$ 20 = 5 + 5 + 5 + 5 $

$ 26 = \dfrac{5^5 - 5}{5!} $

$ 35 = \dfrac{55 + 5!}{5} $

$ 35 = 5 \times 5 + 5 + 5 $

$ 49 = \dfrac{5!}{5} + (5 \times 5) $

$ 50 = 5 \times 5 + 5 \times 5 $

$ 60 = 5 \left( \dfrac{ 5! }{ 5 + 5 } \right) $

$ 70 = 5! + 5 - 55 $

$ 130 = 5 \times 5 \times 5 + 5 $

$ 120 = 5 \times 5 \times 5 - 5 $

$ 123 = \phi^{5+5} + \dfrac{1}{\phi^{5+5}} $

$ 3125 = \dfrac{5 \times 5^5}{5} $

$ 2500 = 5^5 - \dfrac{5^5}{5} $

$ 161051 = 11^5 = \left( \dfrac{55}{5} \right)^5 $